DuraVent Round Type B Gas Vent Model BV 22" Large Diameter Storm Collar btu435000 Covers have a pull string

Covers have a pull string at the bottom for ease of applying and removal

87" (D) x 4" (H) Stainless Steel Plate: 3

Calcoat combustion chamber and rolled steel heat exchanger tubes

5" (L) Clearance 0” clearance to combustibles / vertical installations Listings ULC S636 is Listed as a Class IIA

Model 6TGGTWK Application Factory-built double wall chimney for use with listed wood

DuraVent Round Type B Gas Vent Model BV 22" Large Diameter Storm Collar btu435000 Covers have a pull stringOur non positional lock system on the Duravent BV Gas Vent is the best lock system on the market today. The incorporation of the DuraTab feature simply improves our lock system by adding flexibility and meeting market needs. The BV line of Duravent round vent pipe and fittings is designed for use on approved gas appliances in residential and light commercial and industrial applications. What's Included (1) Large Diameter Storm Collar Features Used